Browse Forums Building A New House Re: Footing Variation with controlled fill 2Apr 14, 2015 9:26 pm The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: Footing Variation with controlled fill 9Apr 14, 2015 11:03 pm Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Footing Variation with controlled fill 10Apr 15, 2015 6:59 am Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Footing Variation with controlled fill 11Apr 15, 2015 7:01 am Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: Footing Variation with controlled fill 17Apr 15, 2015 8:12 pm oneJohn When you say $20k, do you mean your total variation is around $20k while the other bigger house is $16k? If so, that sort of variation in cost within 80 metres wouldn't be so strange. Also, house shape will affect footing costs, and a larger house doesn't always mean more expensive footings. If you check your contract, you may find you can get out of the contract based on the footings variation costs. However, if you might only be looking at $5k difference chances are it won't be worth changing around if you are otherwise happy with the build. Hello oneJohn, Thank you for the post.$20k is only for the extra sitework & footing above the standard.Combinging other site cost all up is 25k for a 164m2 house. I will check my contract soon. Cheers Re: Footing Variation with controlled fill 18Apr 15, 2015 8:15 pm Got the phone call from the developer, was told the land next to my neighboure which is building with our company too. their footing report a little better than me. (these 3 houses are using different engineering companies) I was told just bad luck as my soil has too much clay. Re: Footing Variation with controlled fill 19Apr 15, 2015 8:32 pm LittleSuzi cornellengineers Hi LittleSuzi I'm guessing your slab is a waffle slab with brick veneer walls? If I'm wrong let me know. According to AS2870 (the 'book' of standard waffle slab designs), a H2-D slab will be 460 high compared to a H1-D slab being only 385 high. That extra height (extra strength) results in extra concrete and extra fill around your house when it is complete. I think that will account for some of your cost increase. Compared to a Class S or Class M site, which is a 310 high slab and much lighter reinforcement (same brick veneer) the rest of your cost increase is accounted for. Some of your costs won't change (the concreter still has to turn up) so make sure your builder can itemise the price rise. Matt Cornell Hello Matt Thank you for your post. Yes, it is waffle slab with brick veneer . My footing schedule: Type Beam Size(mm)WidthXDepth Reinforcement top bottom Hangers Type A 250X650 1-N24 1-N24 W10 AT 1000 CTS Type B 250X650 1-N20 1-N24 W10 AT 1000 CTS Type C 250X550 1-N20 1-N24 W8 AT 1000 CTS Looks my footing depth is 650mm,much higher than the standard H2-D slab. Is that nessessory to put that much extra depth of slab? Sorry for the silly questions.haha Cheers, Suzi I assume your site is a class"p" site due to the developers fill so it is up to the engineer to design the appropriate footing which may account for variations from the standards. Is your slab going to be on piers? Re: Footing Variation with controlled fill 20Apr 15, 2015 8:41 pm insider LittleSuzi cornellengineers Hi LittleSuzi I'm guessing your slab is a waffle slab with brick veneer walls? If I'm wrong let me know. According to AS2870 (the 'book' of standard waffle slab designs), a H2-D slab will be 460 high compared to a H1-D slab being only 385 high. That extra height (extra strength) results in extra concrete and extra fill around your house when it is complete. I think that will account for some of your cost increase. Compared to a Class S or Class M site, which is a 310 high slab and much lighter reinforcement (same brick veneer) the rest of your cost increase is accounted for. Some of your costs won't change (the concreter still has to turn up) so make sure your builder can itemise the price rise. Matt Cornell Hello Matt Thank you for your post. Yes, it is waffle slab with brick veneer . My footing schedule: Type Beam Size(mm)WidthXDepth Reinforcement top bottom Hangers Type A 250X650 1-N24 1-N24 W10 AT 1000 CTS Type B 250X650 1-N20 1-N24 W10 AT 1000 CTS Type C 250X550 1-N20 1-N24 W8 AT 1000 CTS Looks my footing depth is 650mm,much higher than the standard H2-D slab. Is that nessessory to put that much extra depth of slab? Sorry for the silly questions.haha Cheers, Suzi I assume your site is a class"p" site due to the developers fill so it is up to the engineer to design the appropriate footing which may account for variations from the standards. Is your slab going to be on piers? Hi Insider Thank you for the post. Yes, it is P(past Tree Removal). Yes, the report design with the piers. Versaloc is a mortarless besser block system that still needs a properly engineered footing. If you just do a 400x200 footing it will fail in time. At 17m long you need it… 1 22270 PM me your email. I have a build excavation calculator you can use based on your plans to double check what your builder is telling you. Cheers Simeon 1 10798 I've dug some footings to embed a post anchor into. My holes are around 450mm deep which I'll put a 200mm stirrup into. The bottom of these holes seem firm enough. … 0 3763 |